Order: Lecanorales       Family: Physciaceae Species: Buellia ocellata Growth type crustose Photos: On upland rock. Ballingeary, Co. Cork, SW Ireland. Small, areolate, green-grey or yellow-grey thallus, sometimes with black prothallus. Immersed black apothecia, epithecium brown to olive. Spores brown, 1-septate, (11-)13-17(-21) x 6.5-9(-11) µm. Microscope photographs below. K-, C+ persistent orange, P-, UV- Found on exposed siliceous rocks, stonework and pebbles, often forming mosaics with Buellia aethalea. Similar: Buellia aethalea, variable, K-, C-, or K+/- yellow going red

Microscope photographs



Buellia ocellata April 2012